鋼骨鋼筋混凝土(SRC)構造耐震設計之研究

Abstract

本研究旨在探討鋼骨鋼筋混凝土(SRC)構造之耐震與韌性設計等相關 問題。本研究首先 針對美國及日本等先進國家最新之SRC耐震設計相關規 範進行比較與探討，經由系統化的交 互比較分析，得以發現各規範在SRC 構材耐震設計及梁柱接頭構造細則方面規定之特色及優 缺點，以作為國 內未來研擬SRC耐震設計規範之參考。 另一方面，本研究針對包覆 型SRC梁之耐震彎矩強度進行探討，研究結果顯示本文所提 出的「直接強 度疊加法」可以合理的評估包覆型SRC梁之耐震彎矩強度。再者，本研究 亦針 對「剛度分配法」在SRC梁柱構材剪力設計之應用提出新的設計方法 。此外，本研究根據 SRC柱中鋼骨翼板與腹板對混凝土圍束效應的貢獻， 探討包覆型SRC柱圍束箍筋與梁柱接頭區 剪力之設計，研究結果發現本文 所建議之設計方法將可得到合理之設計結果。最後，本研究 更進一步針 對耐震設計中SRC構造之韌性容量因子(R值)作系統性之探討，並嘗試提出 相關的 SRC構造R值評估公式，將有助於合理的估算SRC構造之韌性容量。 綜合言之，本研究除了對目前各先進國家有關SRC構造之耐震設計規定作 系統性的深入比 較探討之外，亦針對SRC梁柱構材耐震韌性設計及梁柱接 頭區剪力設計與SRC構造之韌性容量 等問題，提出相關之建議與新的評估 方法，期望本研究之結果能對SRC構造耐震設計之品質提 升有所助益。 This research is devoted to the investigation of the earthquake resistant design of steel reinforced concrete (SRC) composite structures. An extensive literature survey was first conducted towards the state-of art design specifications of the U.S.A., Japan and other countries. Then, a systematic comparative study on the design rules of SRC members and detailing of beam-column joints among these specifications was made. It is intended that this comparison will provide some useful suggestions for the development of a new seismic design code of SRC structures in Taiwan. In addition, a study on the earthquake-resistant bending capacity of encased SRC beams is presented. A new method using the direct superposition approach is proposed, which shows satisfactory results as compared to the values predicted by other existing methods. In the meanwhile, a new design approach is proposed for the shear design of SRC members based on the concept of rigidity distribution method. In addition, this study attempts to investigate the design of lateral ties in concrete encased columns and the shear design of beam-column connection panels, the concrete confinement effect provided by structural steel web and flanges is considered in this study. It is found the results obtained from the proposed method are satisfactory. Finally, this study also presents a new set of equation to evaluate the structural ductility factor (response modification coefficient, R) of SRC buildings, which provides a rational basis for the determination of the R val ues to be used in the seismic design practice.